1969 IWC Schaffhausen Ingenieur Ref.866 AD

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Free Worldwide Insured Courier Shipping / Authenticity Guaranteed / 14-days Inspection Period / 1-year Warranty

Delivery: ca.10 days

Truly legendary vintage watch by IWC Schaffhausen. The original Ingenieur was among the very first watches designed to be truly antimagnetic and resist strong magnetic and electric fields. This particular timepiece represents the second generation of Ingenieur series and has reference 866. The updated execution also combines all the best what you can expect from a vintage watch - oversize yet still elegant 37.5 mm stainless steel case with soft iron inner case and screw-down caseback, reliable and famous "Pellaton" movement, beautiful sunburst dial, and provenance of a real tool watch. 

Professionally serviced in September 2018. Technical warranty: 1 year.


  • Stainless steel 2-body case with screw-down case back and inner case made of soft antimagnetic iron. Mixed satin and high-polished finishing.
  • Immaculate case professionally polished to IWC factory specs.
  • 37.5 mm (without crown) / 48 mm (lug-to-lug) / 18 mm (between lugs)
  • Original signed crown


    • Automatic with sweep second hand and date
    • Precise and collectible Caliber 8541B, signed "International Watch Co Swiss"
    • Pellaton system, 19800 A/h, Incabloc, 44 hours of power reserve.
    • Mint condition. Professionally serviced in September 2018.


    • Original silver "sunburst" dial in outstanding condition.
    • Signed "International Watch Co Schaffhausen" at 12 o’clock. Signed "Ingenieur" at 6 o'clock, signed "T Swiss T" at 6 o'clock.
    • Silver raised hour markers
    • Original steel luminous hands, steel sweep seconds hand.
    • All original lume in excellent condition

    Delivery set:

    • The watch comes with generic calfskin strap and generic steel buckle.
    • Our company’s warranty certificate, invoice and general terms and conditions.

    Collections: IWC, Watches

    Category: IWC

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    Sizing Product

    Measuring a watch

    It is always crucial to understand the size of the watch, especially when it comes to vintage watches which are generally considered as too small in comparison with what watch industry offers today. For example, the original Patek Philippe Calatrava introduced in the 1930s was only 31 mm in diameter, while today's classic Calatrava is 39 mm. When you think about 8 mm, it doesn't seem to be a big difference, but believe it is.

    In our condition reports we normally disclose three most important parameters as follows: diameter without crown / lug-to-lug length / lug width. 

    Diameter without crown

    It is, so far, the most important measurement to understand the size of a regular round-shaped watch.It helps you to understand proportions and overall look of the watch. It is important to consider width of the bezel and color of the dial, because certain combinations may make the watch look bigger, while some other smaller. It is all very individual, however there is common understanding:

    Lug-to-lug width

    This parameter will help you to understand whether the watch is comfortable for wearing. You should compare lug-to-lug width with the width of your wrist, and if lug-to-lug width is smaller or equal, then this watch shall be comfortable.

    Lug width

    This measurement is defining what size of strap you need for the particular watch. Depending on era and manufacturer you can find watches with lug width between 14 mm and 24 mm. Most common sizes are 18 mm and 20 mm.